Knock-off mechanism for slubbers and roving frames



Sept. 20, 1932. J. c. NUNNALLY KNOCK-OFF MECHANISM FOR SLUBBERD AND ROVING FRAQES Filed Feb. 225. 192 2 Sheets-Sheet 1 L i a l mentor Sept. 20, 1932. c NUNNALLY 1,878,533

KNOCK-OFF MECHANISM FOR SLUBBERS AND ROVING FRAMES Filed Feb. 25. 1929 v 2 Sheets-Sheet 2 gwwntoz 1Z6 flunnally Patented Sept. 20, 1932 JAMES d'NUNNALLY, or Gianna, SOUTH CAROLINA KNOCK-OFF MECHANISM FOR SLUBBERS AND'ERQVING FRAMES Application fi led February 23, 929. Seria1 No. 342,142.

This invention relates to the stop motions or knock-off motions of slubbers and kindred mechanisms as for instance roving frames,

fly frames and the like.

. At the present time, all roving frames known to me are dofled by the rack'knockoff motion which is changed each time that the tension gear is changed. With thismechaiiism, when the yarn or roving gets slack in damp weather or tightens up in dry weather, the operative changesthe'tension and all these changes affect the yardage of stock on the bobbins, making it impossible to keep the creeling all run outtogethenthus causing a waste'of stock at each creeling.

v The general'object of the present inveneach dofi of'the roving.

" I My invention is illustrated in the tion is to avoid the difiiculties'above referred to by causing the knock-off to occur by the useof means driven from the contact shaft which in all machines known to me is driven independently of the tension motion, this contact shaft getting its motion from the top cone shaft, thus getting an even yardage on A further object isto provide means readily connected to the ordinary slubber or roving frame as commonly constructed whereby the belt shipper rod may be shifted automatically after a predetermined number of revolutions of the contact shaft. 7

Other objects will appear in the courseof the following description. I

accompanyingdrawings, wherein Figure l is a side elevation of a portion'of a spinning frame showing my knock-off mechanism applied thereto;

Figure 2 is anen'larged sectional view through the upper end of the contact shaft showing means for driving the knock-oft mechanism,- I

Figure 8 is a sectional view through the worm and worm wheel showing the means for supporting the worm wheel; 1

Figure 4 is a section on the line 44 of Figure 1.

Figure 5 is a fragmentary elevation of the worm wheel and knock-off rod.

In these drawings, I have illustratedonly so much of a roving frame,"as forinstance 'a-s1ubber,as is necessary for an understanding of my invention} In the drawings, 10 designates theusual roll beam and 11 sampsons supporting the same. The belt shipper i'rod is' designated 12, this being operatively connected to a knock off arm or lever 13 pivoted at 14 and having the usual weight 15, this knock-off arm,under the action of the weight,'shiftingthe belt shipper rod 12 to;

the right in F igurel and shifting the belt fast to the loose pulley"(the belt and pulleys not being 'shown) The top cone is designated 16 and the bottom cone 17, the top cone 16 being driven by 0 the usual belt 18 and the belt 18 being shifted "over the faces of the cones to change the speed by means of the usual rack 19 actuated in the usual manner by mechanism which it is not necessary to, show as it is well known.

The contact shaft 20 as usual carries'the mutilated beveled gear wheel 21 engaging the'beveled gear wheel 22 on the top cone shaft 23 so that thus the contact shaft receives its motion from the top cone shaft j which inturn receives its motion from the lower cone '17 driven in the usual manner.

So far-I have described'elements which are commonly found in all slubbers', roving mamounted in brackets or supports 26 is a worm shaft 27 extending longitudinally of the machine and parallel to the roll beam'lO. This carries upon ita worm 28. One of the supports 26 has adownwardextension cause a rotationof this crank arm with the worm wheel,,the worm wheel is provided with a pin 31 which as the worm travels engages the arm and turns the crank arm with the roll. The worm wheel travels in a counter-clockwise direction and the pin 31* around in a counter-clockwise direction to a point where the arm 31 will pass the vertical chines and fly frames.

f Mounted upon the contact shaftfor rota- 'tion' therewith is an extension 24 carrying'at its upper end the beveled gear wheel and therefore, picks'upthe arm 31 when the latter isinf a depending position and carries it plane cutting the axis 30*. As soon as the arm 31 reaches this point, the arm 31 will swing downward by gravity and will remain in this position until it is vagain picked up by the pin 31*.

Mounted upon the crank pin 32 of the arm 31 is the knock-off rod .33 which has pro jectingfrom it an inclined lug 3 f. This rod 33 is slidingly supported on a supporting.

member 35 depending from the usual roll beam 10 or otherwise supported for-grecti linear motion. It will-be obvious that as the wheel rotates,the knock-off arm will-be reciprocated.

Pivotally mounted upon the'rollbeam 10'- or adjacent thereto isthe depending trigger 36 which is forked at its" lower: end, one branch 3'7 of thefor'k extending beneath the free end of the knock-off arm 13 While the other branchextends down'in the path of p movement of the lug 34: on the rod 33.

It will be seen that with this construction, ,theshaft 27 which as'before stated is driven from the contact shaft in turn driven from the top cone shaft will make a large number of revolutions before the worm 'gear 30' will have made one complete revolution. As the I .worm gear 30 starts its revolutions in a counter-clockwi'se direction at the beginning of thebobbin filling operation, the rod '33 q will be retracted by the rotation of the arm f contact shaft 20. makes a predetermined 31 and when the worm wheel 30 has made a ger from beneath the knock-off arm, whereeasily applied to roving machines now on the market, and that it is not afiected in any way by changes in tension.

Of course, it will'be und erstoodlthat the number of half revolutions duringvthe winding up of bobbins and before the dofiing there- .of as for instance seventy-two ,half revolutions or thirty-six full revolutions for /2 7 frames 9X4 contact shaft'makes seventytwo half revolutions I or'rthirty-six complete revolutions to one revolution of the worm gear 30. The top cone16 is of course, driven 5 .in the usual manner yfrom the main shaft slubbers while in intermediate through the twist .gear'train. 1

In the operation ofv hismechaniSIm'the worm wheel travels in a counter-clockwise directionand when the pin 31 has reached the position shown in Figure 5, the arm will under the action of gravity leave the 31 andtherod 33 will descend by gravity and swing out oftheway of the latch 36 or in other words will drop back sufliciently to let the swing back under the weighted a change in the end of shipper lever 13. As soon as the disconnection has taken place between the driving mechanism and the winding'machine the frame is readyto be dolfed and to have a new series of bobbins placed thereon for winding. The mechanism which I have devised entirely eliminates the objectional features referred "to in the first'paragraph of this specification.

Asbefore stated, one of the advantages of my invention resides in the fact that the knoclnofi mechanism, is operated by means driven directly from the contact shaft 20 so that this knock-oifmechanism i's not changed when the tension mechanism is changed. In-

,asm'uch' asmy mechanism is driven directly from the contact shaft itself, there is no possibility of any change in the tension making ad ustment the knock-off mechanism.

It is very simple, is readily applied and the action is very positivef While-I have illustrated certain detail's'of Iclain1': I 1. -A knock -off mechanism for winding machines having a contact shaft, the m'echanlsm in a raised position, and a reciprocatable member connected at one end to the crank arm and carrying'a lug adapted to engage the trigger and push the trigger out of supportingenga'gement with'the knock-off arm when .theworm gear has made onecomplete revolution. I

2. In a winding machine, a contact shaft, a

knock-off arm having a weight at one end, a, triggerforsupporting the knock-[off arm, an

auxiliary 'shaft'directly engaged with the contact shaft and'driven thereby and carrying a beveled gear wheel, a longitudinally extending shaft having a'beveled gear wheel en gaging the last na'med beveled gear wheel, supports on the roll beam for supporting said longitudinal shaft, a worm on the longitudinal shaft, a worm wheel below the same with which theworni engages and having a crank construction and arrangement of parts, I do not wish to be limited to these details as obviously many' minor changes mightbe made without departing from the spirit of the invention as defined in the appended claims.

i including a horizontal shaft directly driven from the contact shaft, avworm mounted upon said horizontalishaft, awormf gear engagedby the worm and having a crank arm,

a weighted knock-off arm, a' swingable -trigfger normally supporting the weighted arm arm and a member pivotally mounted on said crank arm and movable longitudinallyto ward and from the trigger, the member having a lug en'gageablefwith the trigger'when the crank arnihas reached a predetermined position to shift the trigger out of engage .ment withthe knock-off arm and permit the knock-off armto drop.

- 3. A knock-off mech nism for windinglinachines twinge contact shaft, the mechanism including a horizontal shaft operatively I driven from the contact shaft, a worm mounted thereon, a Worm gear engaged by the worm and having an outwardly projecting pin, a rotatable arm loosely mounted upon an axis concentric to that of the worm gear and with which arm the weighted knock-0E arm, a swingable trigger supporting the knock-off arm in a raised position, and a member connected at one end of the rotatable arm and reciprocated thereby and carrying a lug and adapted to engage the trigger and shift the trigger out of engagement with the knock-01f arm and permit the knock-off arm to drop when the worm gear has made one complete revolution.

4. A knock-0E mechanism for winding machines having a contact or tumblingshaft, the mechanism including a rotatable element operatively driven from the contact shaft at reduced speed, porting the arm, a crank arm loosely mounted for rotation around the axis of rotation of said rotatable element, a pin carried by said rotatable element and radially spaced from the axis thereof, and adapted in the rotation of the rotatable element to engage with and pick up the crank arm and rotate this arm through approximately three-fourths of a 1 revolution with the rotatable element, the arm then dropping by gravity to a depending position, a rod pivoted to said crank arm and rectilinearly movable thereby and adapted in its forward movement to release said trigger to allow the knock-off arm to drop when the crank arm associated with the rotatable element has moved through approximately three-fourths of a complete revolution.

In testimony whereof I hereunto aifix my JAMES C. N UN N ALLY.

signature.

pin is adapted to engage, a i

a knock-01f arm, a trigger sup- 

